Extending your home in Wilmslow
Every type of house extension in Wilmslow, from single-storey kitchen extensions to two-storey additions, side returns and orangeries. We design, handle the approvals and build.
- Postcode districtsSK9
- Price regionNorth West England (×0.95)
- Planning rulesEngland
- Site visitFree, no obligation
Choosing the right extension in Wilmslow
Across the North West, terraced houses with small rear yards suit compact rear and side return extensions, while suburban semis have room for more.
Depending on the plot, kitchen extensions and double-storey extensions are often the strongest options, with single-storey rear extensions worth considering where there is room.
Popular extension prices in Wilmslow
Prices on this page use our North West England factor of ×0.95, include VAT at 20% and cover the build; your written price follows a survey and agreed drawings.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Side return extensions | 11 m² | £25,000 – £31,500 |
| Double-storey extensions | 32 m² | £54,500 – £71,500 |
| Single-storey rear extensions | 20 m² | £38,500 – £49,500 |
| Kitchen extensions | 20 m² | £39,500 – £50,500 |
| Wraparound extensions | 25 m² | £54,500 – £69,000 |
Areas we cover around Wilmslow
Postcode districts we cover around Wilmslow include SK9. We also work in nearby Macclesfield (6 miles), Congleton (11 miles), Northwich (13 miles), Warrington (15 miles), Winsford (15 miles). Just over the Greater Manchester border, Cheadle Hulme is about 4 miles away.
Do extensions in Wilmslow need planning permission?
In England a single-storey rear extension can usually go up to 3 m beyond the original rear wall of a semi-detached or terraced house, or 4 m on a detached house, without a planning application, provided it is no more than 4 m high, keeps eaves to 3 m within 2 m of a boundary and, with other buildings, covers no more than half the land around the original house. The larger home extension prior approval scheme raises those depths to 6 m and 8 m, with neighbours notified and a 42-day decision.
In England a two-storey rear extension is permitted development only if it projects no more than 3 m from the original rear wall, sits at least 7 m from the rear boundary, matches the roof pitch and uses obscure, non-opening side windows upstairs. Most two-storey extensions therefore go through a householder planning application, which costs £548 from 1 April 2026 and normally takes about 8 weeks.
In a conservation area, national park, National Landscape, the Broads or a World Heritage Site the permitted development limits are tighter (no side or two-storey extensions without an application). Listed homes need listed building consent, and if permitted development rights have been removed, any extension needs an application.
If the work involves a shared wall, building on the boundary, or digging foundations within 3 m (sometimes 6 m) of a neighbour's building, the Party Wall etc. Act 1996 applies and notice must be served before work starts: two months for work to a party wall, one month for new walls on the boundary and for excavations.
Applications are decided by the local planning authority (your district, borough or unitary council).
Extension types and starting prices
- Side return extensions · from £17,000
- Bedroom extensions · from £24,500
- Conservatory replacement extensions · from £19,000
- Utility and boot room extensions · from £13,000
- Annexe extensions · from £52,000
- Bungalow extensions · from £24,500
- Single-storey rear extensions · from £19,500
- Kitchen extensions · from £25,500
- Wraparound extensions · from £34,000
- Orangery extensions · from £28,500
- Building regulations for extensions · from £850
- Extensions over a garage · from £22,500
- Flat roof extensions · from £19,500
- Glass box extensions · from £28,500
- Extension plans and drawings · from £1,100
- Double-storey extensions · from £36,000
- Porch extensions · from £3,800
- Planning permission for extensions · from £300
- Home office extensions · from £15,000
- Pitched roof extensions · from £21,000
- Timber frame extensions · from £19,500
- Side extensions · from £20,500
Free site visit
A designer visits, takes measurements and photos, and discusses layouts, budget and timing with you.
Design and approvals
Drawings are prepared and agreed with you, then submitted for the right planning route and building regulations approval.
Fixed written price
The price is fixed in writing once the design is settled, with a clear programme and payment stages.
Build and sign-off
We build it with one project manager, book the building control inspections and hand over the completion certificate.
Questions about extensions in Wilmslow
How much does an extension cost in Wilmslow?
Using our North West England factor (×0.95), a standard-spec single-storey extension of 20 m² is a guide £38,500 to £49,500 including VAT, and a 32 m² two-storey extension £54,500 to £71,500. Your written price follows the survey.
Do I need planning permission for an extension in Wilmslow?
Not always. It depends on the size, position and your property's history. Many single-storey rear extensions in England are permitted development or can use prior approval.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Wilmslow, and the guide-price tool gives a range for your own size and finish in about a minute.
Do you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
Book a free site visit in Wilmslow
We will measure up, check the planning position and give you honest guide figures.
- Free, no-obligation site visit
- Planning route checked before you spend on drawings
- Written price once the design is agreed
- Building control sign-off at the end
Prefer to talk? Call 0800 088 6341 or .
Book a free site visit
Tell us a little about the project and we will arrange a time.